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Kim D, Nicoletti C, Soedirdjo SDH, Baghi R, Garcia MG, Läubli T, Wild P, Botter A, Martin BJ. Effect of Periodic Voluntary Interventions on Trapezius Activation and Fatigue During Light Upper Limb Activity. HUMAN FACTORS 2023; 65:1491-1505. [PMID: 34875887 DOI: 10.1177/00187208211050723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
OBJECTIVE The effects of diverse periodic interventions on trapezius muscle fatigue and activity during a full day of computer work were investigated. BACKGROUND Musculoskeletal disorders, including trapezius myalgia, may be associated with repeated exposure to prolonged low-level activity, even during light upper-extremity tasks including computer work. METHODS Thirty healthy adults participated in a study that simulated two 6-hour workdays of computer work. One workday involved imposed periodic passive and active interventions aimed at disrupting trapezius contraction monotony (Intervention day), whereas the other workday did not (Control day). Trapezius muscle activity was quantified by the 3-dimensional acceleration of the jolt movement of the acromion produced by electrically induced muscle twitches. The spatio-temporal distribution of trapezius activity was measured through high-density surface electromyography (HD-EMG). RESULTS The twitch acceleration magnitude in one direction was significantly different across measurement periods (p = 0.0156) on Control day, whereas no significant differences in any direction were observed (p > 0.05) on Intervention day. The HD-EMG from Intervention day showed that only significant voluntary muscle contractions (swing arms, Jacobson maneuver) induced a decrease in the muscle activation time and an increase in the spatial muscle activation areas (p < 0.01). CONCLUSION Disruption of trapezius monotonous activity via brief voluntary contractions effectively modified the ensuing contraction pattern (twitch acceleration along one axis, active epochs reduction, and larger spatial distribution). The observed changes support an associated reduction of muscle fatigue. APPLICATION This study suggests that disruptive intervention activity is efficient in reducing the impact of trapezius muscle fatigue.
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Affiliation(s)
| | - Corine Nicoletti
- Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Institute of Health Sciences, Zurich University of Applied Sciences, Winterthur, Switzerland
| | - Subaryani D H Soedirdjo
- Laboratory for Engineering of the Neuromuscular System (LISiN), Department of Electronics and Telecommunications, Politecnico di, Torino, Turin, Italy
- Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Raziyeh Baghi
- Department of Physical Therapy and Rehabilitation Science, School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Maria-Gabriela Garcia
- Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Department of Industrial Engineering, School of Engineering, Universidad San Francisco de Quito, Quito, Ecuador
| | - Thomas Läubli
- Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Institute of Occupational and Social Medicine and Health Services Research, University of Tübingen, Tübingen, Germany
| | - Pascal Wild
- French National Research and Safety Institute (INRS), Vandœuvre lès Nancy, France
| | - Alberto Botter
- Laboratory for Engineering of the Neuromuscular System (LISiN), Department of Electronics and Telecommunications, Politecnico di, Torino, Turin, Italy
| | - Bernard J Martin
- Department of Health Sciences and Technology, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Department of Industrial and Operations Engineering, School of Engineering, University of Michigan, Ann Arbor, MI, USA
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Kong YK, Park SS, Shim JW, Choi KH, Shim HH, Kia K, Kim JH. A passive upper-limb exoskeleton reduced muscular loading during augmented reality interactions. APPLIED ERGONOMICS 2023; 109:103982. [PMID: 36739780 DOI: 10.1016/j.apergo.2023.103982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
The aim of this study was to evaluate a passive upper-limb exoskeleton as an ergonomic control to reduce the musculoskeletal load in the shoulders associated with augmented reality (AR) interactions. In a repeated-measures laboratory study, each of the 20 participants performed a series of AR tasks with and without a commercially-available upper-limb exoskeleton. During the AR tasks, muscle activity (anterior, middle, posterior deltoid, and upper trapezius), shoulder joint postures/moment, and self-reported discomfort were collected. The results showed that the exoskeleton significantly reduced muscle activity in the upper trapezius and deltoid muscle groups and self-reported discomfort. However, the shoulder postures and task performance measures were not affected by the exoskeleton during the AR interactions. Given the significant decrease in muscle activity and discomfort without compromising task performance, a passive exoskeleton can be an effective ergonomic control measure to reduce the risks of developing musculoskeletal discomfort or injuries in the shoulder regions.
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Affiliation(s)
- Yong-Ku Kong
- Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA
| | - Sang-Soo Park
- Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA
| | - Jin-Woo Shim
- Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA
| | - Kyeong-Hee Choi
- Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA
| | - Hyun-Ho Shim
- Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA
| | - Kiana Kia
- College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA
| | - Jeong Ho Kim
- College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA.
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Tsao L, Kim S, Ma L, Nussbaum MA. An exploratory study comparing three work/rest schedules during simulated repetitive precision work. ERGONOMICS 2021; 64:1579-1594. [PMID: 34224340 DOI: 10.1080/00140139.2021.1950844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
The pattern of work and rest can influence both physical fatigue and task performance in manual operations. However, there is relatively limited evidence regarding the influences of specific work/rest schedules in tasks requiring high repetitiveness and precision demands, along with relatively low exertion levels. Eighteen participants completed an exploratory study that simulated such tasks, to compare the effects of three distinct work/rest schedules (i.e. short frequent [short] and long infrequent breaks [long], and a self-selected schedule) on muscle fatigue, task performance (in terms of accuracy and speed), and preference. Schedules with long or self-selected breaks generally induced less muscle fatigue, compared with the short break condition. Participants preferred the self-selected condition the most and the long-break condition the least. The different schedules tested did not influence task performance. A self-selected schedule may be beneficial for repetitive precision task, to achieve a balance across muscle fatigue, task performance, and individual preference. Practitioner summary: Influences of three work/rest schedules (i.e. short and long breaks, and a self-selected schedule) on fatigue, performance, and preference were explored during repetitive precision tasks. Schedules with long or self-selected breaks induced less muscle fatigue and none of the three schedules influenced performance. A self-selected schedule was the most preferred.
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Affiliation(s)
- Liuxing Tsao
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, USA
- Department of Industrial Engineering, Tsinghua University, Beijing, China
- Teaching Center for Writing and Communication, School of Humanities, Tsinghua University, Beijing, China
| | - Sunwook Kim
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Liang Ma
- Department of Industrial Engineering, Tsinghua University, Beijing, China
| | - Maury A Nussbaum
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, USA
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Pattern recognition based on HD-sEMG spatial features extraction for an efficient proportional control of a robotic arm. Biomed Signal Process Control 2019. [DOI: 10.1016/j.bspc.2019.04.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bauer CM, Kankaanpää MJ, Meichtry A, Rissanen SM, Suni JH. Efficacy of six months neuromuscular exercise on lumbar movement variability - A randomized controlled trial. J Electromyogr Kinesiol 2019; 48:84-93. [PMID: 31252284 DOI: 10.1016/j.jelekin.2019.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 06/11/2019] [Accepted: 06/20/2019] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Lumbar movement variability during heavy, repetitive work may be a protective mechanism to diminish the progression of lumbar disorders and maintain neuromuscular functional integrity. The effect of neuromuscular exercise (NME) on the variability of lumbar movement is still to be determined. METHODS A randomised controlled trial was conducted on a population of nursing personnel with subacute LBP. Following randomization, the NME group participants completed an NME program of six months duration. The participants in the control group only attended the assessment sessions. The outcomes were assessed at: baseline; after six months intervention; 12 months. The primary outcome was lumbar movement variability based on angular displacement and velocity. RESULTS A positive treatment effect on lumbar movement variability was seen after six months of NME intervention. Angular displacement improved, and angular velocity remained constant. At the 12-month follow up, however, the effect faded in the NME group. Lumbar movement variability worsened in the control group over all time periods. CONCLUSION NME may improve lumbar movement variability in the short term and may indicate improved neuromuscular functional integrity. The design of an optimal NME program to achieve long-term improvement in lumbar movement variability is a subject worthy of further research.
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Affiliation(s)
- C M Bauer
- University of Tampere, School of Medicine, Kalevantie 4, 33014 University of Tampere, Finland; Zurich University of Applied Sciences, Department of Health, Institute of Physiotherapy, Technikumstrasse 71, 8400 Winterthur, Switzerland.
| | - M J Kankaanpää
- University of Tampere, School of Medicine, Kalevantie 4, 33014 University of Tampere, Finland; Pirkanmaa Hospital District, Physical and Rehabilitation Medicine Outpatient Clinic, Box 2000, 33521 Tampere, Finland.
| | - A Meichtry
- Zurich University of Applied Sciences, Department of Health, Institute of Physiotherapy, Technikumstrasse 71, 8400 Winterthur, Switzerland.
| | - S M Rissanen
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.
| | - J H Suni
- UKK Institute for Health Promotion Research, Kaupinpuistonkatu 1, 33500 Tampere, Finland.
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Zargari Marandi R, Madeleine P, Omland Ø, Vuillerme N, Samani A. An oculometrics-based biofeedback system to impede fatigue development during computer work: A proof-of-concept study. PLoS One 2019; 14:e0213704. [PMID: 31150405 PMCID: PMC6544207 DOI: 10.1371/journal.pone.0213704] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/18/2019] [Indexed: 12/19/2022] Open
Abstract
A biofeedback system may objectively identify fatigue and provide an individualized timing plan for micro-breaks. We developed and implemented a biofeedback system based on oculometrics using continuous recordings of eye movements and pupil dilations to moderate fatigue development in its early stages. Twenty healthy young participants (10 males and 10 females) performed a cyclic computer task for 31–35 min over two sessions: 1) self-triggered micro-breaks (manual sessions), and 2) biofeedback-triggered micro-breaks (automatic sessions). The sessions were held with one-week inter-session interval and in a counterbalanced order across participants. Each session involved 180 cycles of the computer task and after each 20 cycles (a segment), the task paused for 5-s to acquire perceived fatigue using Karolinska Sleepiness Scale (KSS). Following the pause, a 25-s micro-break involving seated exercises was carried out whether it was triggered by the biofeedback system following the detection of fatigue (KSS≥5) in the automatic sessions or by the participants in the manual sessions. National Aeronautics and Space Administration Task Load Index (NASA-TLX) was administered after sessions. The functioning core of the biofeedback system was based on a Decision Tree Ensemble model for fatigue classification, which was developed using an oculometrics dataset previously collected during the same computer task. The biofeedback system identified fatigue with a mean accuracy of approx. 70%. Perceived workload obtained from NASA-TLX was significantly lower in the automatic sessions compared with the manual sessions, p = 0.01 Cohen’s dz = 0.89. The results give support to the effectiveness of integrating oculometrics-based biofeedback in timing plan of micro-breaks to impede fatigue development during computer work.
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Affiliation(s)
- Ramtin Zargari Marandi
- Department of Health Science and Technology, Sport Sciences, Aalborg University, Aalborg, Denmark
- Univ. Grenoble Alpes, AGEIS, Grenoble, France
| | - Pascal Madeleine
- Department of Health Science and Technology, Sport Sciences, Aalborg University, Aalborg, Denmark
| | - Øyvind Omland
- Department of Health Science and Technology, Sport Sciences, Aalborg University, Aalborg, Denmark
- Aalborg University Hospital, Clinic of Occupational Medicine, Danish Ramazzini Center, Aalborg, Denmark
| | - Nicolas Vuillerme
- Department of Health Science and Technology, Sport Sciences, Aalborg University, Aalborg, Denmark
- Univ. Grenoble Alpes, AGEIS, Grenoble, France
- Institut Universitaire de France, Paris, France
| | - Afshin Samani
- Department of Health Science and Technology, Sport Sciences, Aalborg University, Aalborg, Denmark
- * E-mail:
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Januario LB, Madeleine P, Cid MM, Samani A, Oliveira AB. Can exposure variation be promoted in the shoulder girdle muscles by modifying work pace and inserting pauses during simulated assembly work? APPLIED ERGONOMICS 2018; 66:151-160. [PMID: 28958424 DOI: 10.1016/j.apergo.2017.08.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 08/16/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
This study investigated the acute effects of changing the work pace and implementing two pause types during an assembly task. Eighteen healthy women performed a simulated task in four different conditions: 1) slow or 2) fast work pace with 3) passive or 4) active pauses every two minutes. The root mean square (RMS) and exposure variation analysis (EVA) from the trapezius and serratus anterior muscles, as well as the rate of perceived exertion (RPE) from the neck-shoulder region, were observed. Decreased RMS and RPE as well as more variable muscle activity (EVA) were observed in the slow work pace compared with the fast one. The pause types had a limited effect, but active pauses resulted in increased RMS of the clavicular trapezius. The findings revealed the importance of work pace in the reduction of perceived exertion and promotion of variation in muscle activation during assembly tasks. However, the pause types had no important effect on the evaluated outcomes.
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Affiliation(s)
- Leticia Bergamin Januario
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, São Carlos, São Paulo, Brazil; Laboratory for Ergonomics and Work-Related Disorders, Physical Activity and Human Performance Group - SMI, Department of Health Science and Technology, Aalborg University, Aalborg East, Denmark.
| | - Pascal Madeleine
- Laboratory for Ergonomics and Work-Related Disorders, Physical Activity and Human Performance Group - SMI, Department of Health Science and Technology, Aalborg University, Aalborg East, Denmark
| | - Marina Machado Cid
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Afshin Samani
- Laboratory for Ergonomics and Work-Related Disorders, Physical Activity and Human Performance Group - SMI, Department of Health Science and Technology, Aalborg University, Aalborg East, Denmark
| | - Ana Beatriz Oliveira
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, São Carlos, São Paulo, Brazil
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St-Onge N, Samani A, Madeleine P. Integration of active pauses and pattern of muscular activity during computer work. ERGONOMICS 2017; 60:1228-1239. [PMID: 28304226 DOI: 10.1080/00140139.2017.1303086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
Submaximal isometric muscle contractions have been reported to increase variability of muscle activation during computer work; however, other types of active contractions may be more beneficial. Our objective was to determine which type of active pause vs. rest is more efficient in changing muscle activity pattern during a computer task. Asymptomatic regular computer users performed a standardised 20-min computer task four times, integrating a different type of pause: sub-maximal isometric contraction, dynamic contraction, postural exercise and rest. Surface electromyographic (SEMG) activity was recorded bilaterally from five neck/shoulder muscles. Root-mean-square decreased with isometric pauses in the cervical paraspinals, upper trapezius and middle trapezius, whereas it increased with rest. Variability in the pattern of muscular activity was not affected by any type of pause. Overall, no detrimental effects on the level of SEMG during active pauses were found suggesting that they could be implemented without a cost on activation level or variability. Practitioner Summary: We aimed to determine which type of active pause vs. rest is best in changing muscle activity pattern during a computer task. Asymptomatic computer users performed a standardised computer task integrating different types of pauses. Muscle activation decreased with isometric pauses in neck/shoulder muscles, suggesting their implementation during computer work.
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Affiliation(s)
- Nancy St-Onge
- a Department of Exercise Science , Concordia University , Montreal , Canada
- b Center for Interdisciplinary Research in Rehabilitation of Greater Montreal - Constance Lethbridge site , Montreal , Canada
- c Laboratory for Ergonomics and Work-related Disorders, Physical Activity and Human Performance group - SMI, Department of Health Science and Technology , Aalborg University , Aalborg East , Denmark
| | - Afshin Samani
- c Laboratory for Ergonomics and Work-related Disorders, Physical Activity and Human Performance group - SMI, Department of Health Science and Technology , Aalborg University , Aalborg East , Denmark
| | - Pascal Madeleine
- c Laboratory for Ergonomics and Work-related Disorders, Physical Activity and Human Performance group - SMI, Department of Health Science and Technology , Aalborg University , Aalborg East , Denmark
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Suda EY, Sacco ICN, Hirata RP, Samani A, Kawamura TT, Madeleine P. Later stages of diabetic neuropathy affect the complexity of the neuromuscular system at the knee during low-level isometric contractions. Muscle Nerve 2017; 57:112-121. [PMID: 28224646 DOI: 10.1002/mus.25627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 02/13/2017] [Accepted: 02/19/2017] [Indexed: 12/19/2022]
Abstract
INTRODUCTION This study evaluates the complexity of force and surface electromyography (sEMG) during knee extension and flexion at low-level isometric contractions in individuals with different degrees of diabetic peripheral neuropathy (DPN). METHODS Ten control and 38 diabetic participants performed isometric contractions at 10%, 20%, and 30% of maximal voluntary contraction. Knee force and multichannel sEMG from vastus lateralis (VL) and biceps femoris were acquired. The SD of force and sample entropy (SaEn) of both force and sEMG were computed. RESULTS Participants with moderate DPN demonstrated high force-SD and low force-SaEn. Severely affected participants showed low SaEn in VL at all force levels. DISCUSSION DPN affects the complexity of the neuromuscular system at the knee for the extension task during low-level isometric contractions, with participants in the later stages of the disease (moderate and severe) demonstrating most of the changes. Muscle Nerve 57: 112-121, 2018.
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Affiliation(s)
- Eneida Y Suda
- Laboratory of Biomechanics of Human Movement, Department of Physical Therapy, Speech and Occupational Therapy, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Isabel C N Sacco
- Laboratory of Biomechanics of Human Movement, Department of Physical Therapy, Speech and Occupational Therapy, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Rogerio P Hirata
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220, Aalborg East, Denmark
| | - Afshin Samani
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220, Aalborg East, Denmark
| | - Thiago T Kawamura
- Laboratory of Biomechanics of Human Movement, Department of Physical Therapy, Speech and Occupational Therapy, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Pascal Madeleine
- SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220, Aalborg East, Denmark
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Januario LB, Moreira RDFC, Cid MM, Samani A, Madeleine P, Oliveira AB. Effects of active pause pattern of surface electromyographic activity among subjects performing monotonous tasks: A systematic review. J Electromyogr Kinesiol 2016; 30:196-208. [DOI: 10.1016/j.jelekin.2016.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Revised: 06/27/2016] [Accepted: 07/21/2016] [Indexed: 12/31/2022] Open
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Is rotating between static and dynamic work beneficial for our fatigue state? J Electromyogr Kinesiol 2016; 28:104-13. [DOI: 10.1016/j.jelekin.2016.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 03/29/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022] Open
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Gaffney BM, Maluf KS, Davidson BS. Evaluation of Novel EMG Biofeedback for Postural Correction During Computer Use. Appl Psychophysiol Biofeedback 2015; 41:181-9. [DOI: 10.1007/s10484-015-9328-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Vafadar AK, Côté JN, Archambault PS. Sex differences in the shoulder joint position sense acuity: a cross-sectional study. BMC Musculoskelet Disord 2015; 16:273. [PMID: 26423066 PMCID: PMC4589903 DOI: 10.1186/s12891-015-0731-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 09/21/2015] [Indexed: 12/16/2022] Open
Abstract
Background Work-related musculoskeletal disorders (WMSD) is the most expensive form of work disability. Female sex has been considered as an individual risk factor for the development of WMSD, specifically in the neck and shoulder region. One of the factors that might contribute to the higher injury rate in women is possible differences in neuromuscular control. Accordingly the purpose of this study was to estimate the effect of sex on shoulder joint position sense acuity (as a part of shoulder neuromuscular control) in healthy individuals. Methods Twenty-eight healthy participants, 14 females and 14 males were recruited for this study. To test position sense acuity, subjects were asked to flex their dominant shoulder to one of the three pre-defined angle ranges (low, mid and high-ranges) with eyes closed, hold their arm in that position for three seconds, go back to the starting position and then immediately replicate the same joint flexion angle, while the difference between the reproduced and original angle was taken as the measure of position sense error. The errors were measured using Vicon motion capture system. Subjects reproduced nine positions in total (3 ranges × 3 trials each). Results Calculation of absolute repositioning error (magnitude of error) showed no significant difference between men and women (p-value ≥ 0.05). However, the analysis of the direction of error (constant error) showed a significant difference between the sexes, as women tended to mostly overestimate the target, whereas men tended to both overestimate and underestimate the target (p-value ≤ 0.01, observed power = 0.79). The results also showed that men had a significantly more variable error, indicating more variability in their position sense, compared to women (p-value ≤ 0.05, observed power = 0.78). Discussion Differences observed in the constant JPS error suggest that men and women might use different neuromuscular control strategies in the upper limb. In addition, higher JPS variability observed in men might be one of the factors that could contribute to their lower rate of musculoskeletal disorders, compared to women. Conclusions The result of this study showed that shoulder position sense, as part of the neuromuscular control system, differs between men and women. This finding can help us better understand the reasons behind the higher rate of musculoskeletal disorders in women, especially in the working environments.
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Affiliation(s)
- Amir K Vafadar
- School of Physical and Occupational Therapy, McGill University and Interdisciplinary Research Center in Rehabilitation (CRIR), 3654 Promenade Sir William Osler, Montreal, QC, H3G 1Y5, Canada.
| | - Julie N Côté
- Department of Kinesiology and Physical Education, McGill University and Interdisciplinary Research Center in Rehabilitation (CRIR), 475 Pine Avenue West, Montreal, QC, H2W 1S4, Canada.
| | - Philippe S Archambault
- School of Physical and Occupational Therapy, McGill University and Interdisciplinary Research Center in Rehabilitation (CRIR), 3654 Promenade Sir William Osler, Montreal, QC, H3G 1Y5, Canada.
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Srinivasan D, Mathiassen SE, Hallman DM, Samani A, Madeleine P, Lyskov E. Effects of concurrent physical and cognitive demands on muscle activity and heart rate variability in a repetitive upper-extremity precision task. Eur J Appl Physiol 2015; 116:227-39. [DOI: 10.1007/s00421-015-3268-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/15/2015] [Indexed: 11/30/2022]
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Luger T, Bosch T, Hoozemans M, de Looze M, Veeger D. Task variation during simulated, repetitive, low-intensity work--influence on manifestation of shoulder muscle fatigue, perceived discomfort and upper-body postures. ERGONOMICS 2015; 58:1851-1867. [PMID: 26046391 DOI: 10.1080/00140139.2015.1043356] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
UNLABELLED Work-related musculoskeletal disorders are increasing due to industrialisation of work processes. Task variation has been suggested as potential intervention. The objectives of this study were to investigate, first, the influence of task variation on electromyographic (EMG) manifestations of shoulder muscle fatigue and discomfort; second, noticeable postural shoulder changes over time; third, if the association between task variation and EMG might be biased by postural changes. Outcome parameters were recorded using multichannel EMG, Optotrak and the Borg scale. Fourteen participants performed a one-hour repetitive Pegboard task in one continuous and two interrupted conditions with rest and a pick-and-place task, respectively. Manifestations of shoulder muscle fatigue and discomfort feelings were observed throughout the conditions but these were not significantly influenced by task variation. After correction for joint angles, the relation between task variation and EMG was significantly biased but significant effects of task variation remained absent. PRACTITIONER SUMMARY Comparing a one-hour continuous, repetitive Pegboard task with two interrupted conditions revealed no significant influences of task variation. We did observe that the relation between task variation and EMG was biased by posture and therefore advise taking account for posture when investigating manifestations of muscle fatigue in assembly tasks.
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Affiliation(s)
- Tessy Luger
- a MOVE Research Institute , Faculty of Human Movement Sciences, VU University Amsterdam , Amsterdam , The Netherlands
- b TNO , Leiden , The Netherlands
- c Body@Work, Research Centre of Physical Activity, Work and Health , TNO-VU/VUmc , Amsterdam , The Netherlands
| | - Tim Bosch
- b TNO , Leiden , The Netherlands
- c Body@Work, Research Centre of Physical Activity, Work and Health , TNO-VU/VUmc , Amsterdam , The Netherlands
| | - Marco Hoozemans
- a MOVE Research Institute , Faculty of Human Movement Sciences, VU University Amsterdam , Amsterdam , The Netherlands
| | - Michiel de Looze
- a MOVE Research Institute , Faculty of Human Movement Sciences, VU University Amsterdam , Amsterdam , The Netherlands
- b TNO , Leiden , The Netherlands
- c Body@Work, Research Centre of Physical Activity, Work and Health , TNO-VU/VUmc , Amsterdam , The Netherlands
| | - Dirkjan Veeger
- a MOVE Research Institute , Faculty of Human Movement Sciences, VU University Amsterdam , Amsterdam , The Netherlands
- d Laboratory for Biomechatronics and Biorobotics, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Delft , The Netherlands
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Samani A, Pontonnier C, Dumont G, Madeleine P. Shoulder kinematics and spatial pattern of trapezius electromyographic activity in real and virtual environments. PLoS One 2015; 10:e0116211. [PMID: 25768123 PMCID: PMC4358981 DOI: 10.1371/journal.pone.0116211] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 12/05/2014] [Indexed: 11/29/2022] Open
Abstract
The design of an industrial workstation tends to include ergonomic assessment steps based on a digital mock-up and a virtual reality setup. Lack of interaction and system fidelity is often reported as a main issue in such virtual reality applications. This limitation is a crucial issue as thorough ergonomic analysis is required for an investigation of the biomechanics. In the current study, we investigated the biomechanical responses of the shoulder joint in a simulated assembly task for comparison with the biomechanical responses in virtual environments. Sixteen male healthy novice subjects performed the task on three different platforms: real (RE), virtual (VE), and virtual environment with force feedback (VEF) with low and high precision demands. The subjects repeated the task 12 times (i.e., 12 cycles). High density electromyography from the upper trapezius and rotation angles of the shoulder joint were recorded and split into the cycles. The angular trajectories and velocity profiles of the shoulder joint angles over a cycle were computed in 3D. The inter-subject similarity in terms of normalized mutual information on kinematics and electromyography was investigated. Compared with RE the task in VE and VEF was characterized by lower kinematic maxima. The inter-subject similarity in RE compared with intra-subject similarity across the platforms was lower in terms of movement trajectories and greater in terms of trapezius muscle activation. The precision demand resulted in lower inter- and intra-subject similarity across platforms. The proposed approach identifies biomechanical differences in the shoulder joint in both VE and VEF compared with the RE platform, but these differences are less marked in VE mostly due to technical limitations of co-localizing the force feedback system in the VEF platform.
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Affiliation(s)
- Afshin Samani
- Laboratory for Ergonomics and Work-related Disorders, Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220, Aalborg East, Denmark
| | - Charles Pontonnier
- Centre de Recherche des Ecoles de Coëtquidan, Ecoles Militaires de Saint-Cyr Coëtquidan, 56 381, Guer, France
- MimeTIC, IRISA/INRIA Centre de Bretagne, Campus de Beaulieu, 35042, Rennes, France
| | - Georges Dumont
- MimeTIC, IRISA/INRIA Centre de Bretagne, Campus de Beaulieu, 35042, Rennes, France
- ENS Rennes, Campus de Ker Lann, 35170, Bruz, France
| | - Pascal Madeleine
- Laboratory for Ergonomics and Work-related Disorders, Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220, Aalborg East, Denmark
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17
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Mista CA, Christensen SW, Graven-Nielsen T. Modulation of motor variability related to experimental muscle pain during elbow-flexion contractions. Hum Mov Sci 2015; 39:222-35. [DOI: 10.1016/j.humov.2014.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 07/30/2014] [Accepted: 09/17/2014] [Indexed: 11/29/2022]
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18
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Kawczyński A, Samani A, Mroczek D, Chmura P, Błach W, Migasiewicz J, Klich S, Chmura J, Madeleine P. Functional connectivity between core and shoulder muscles increases during isometric endurance contractions in judo competitors. Eur J Appl Physiol 2015; 115:1351-8. [PMID: 25633071 DOI: 10.1007/s00421-015-3114-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 01/19/2015] [Indexed: 11/25/2022]
Abstract
PURPOSE The aim of this study was to assess the surface electromyogram (SEMG) changes within and between muscles of the torso and shoulder region during static endurance contraction in elite judokas. We hypothesized an increased functional connectivity of muscles from the shoulder and torso regions during sustained isometric contraction. METHODS Twelve healthy, right-handed judo competitors participated in the study. The SEMG signals from the dominant trapezius (upper, middle and lower part), deltoideus anterior, serratus anterior, and pectoralis major muscles were recorded during isometric endurance contraction consisting of bilateral arm abduction at 90°. The normalized mutual information (NMI) was computed between muscle pairs as an index indicating functional connectivity. RESULTS The NMIs increased significantly during endurance test for 10 of the 15 muscle pairs (P < 0.001). CONCLUSION We concluded that the increases in NMIs highlighted functional changes in the interplay between core and shoulder muscles during an endurance contraction in elite judokas.
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Affiliation(s)
- Adam Kawczyński
- Department of Athletes Motor Skills, University School of Physical Education, al.I.J Paderewskiego 35, Wrocław, Poland
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Sjøgaard G, Søgaard K. Muscle activity pattern dependent pain development and alleviation. J Electromyogr Kinesiol 2014; 24:789-94. [DOI: 10.1016/j.jelekin.2014.08.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 08/18/2014] [Indexed: 11/25/2022] Open
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20
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RATHLEFF MICHAELS, SAMANI AFSHIN, OLESEN JENSL, ROOS EWAM, RASMUSSEN STEN, CHRISTENSEN BIRGITTEH, MADELEINE PASCAL. Neuromuscular Activity and Knee Kinematics in Adolescents with Patellofemoral Pain. Med Sci Sports Exerc 2013; 45:1730-9. [DOI: 10.1249/mss.0b013e318292be30] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Srinivasan D, Mathiassen SE. Motor variability in occupational health and performance. Clin Biomech (Bristol, Avon) 2012; 27:979-93. [PMID: 22954427 DOI: 10.1016/j.clinbiomech.2012.08.007] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 08/13/2012] [Accepted: 08/16/2012] [Indexed: 02/07/2023]
Abstract
Several recent reviews have reported that 'repetitive movements' constitute a risk factor for occupational musculoskeletal disorders in the neck, shoulder and arm regions. More variation in biomechanical exposure is often suggested as an effective intervention in such settings. Since increasing variation using extrinsic methods like job rotation may not always be possible in an industrial context, the intrinsic variability of the motor system may offer an alternative opportunity to increase variation. Motor variability refers to the natural variation in postures, movements and muscle activity observed to different extents in all tasks. The current review discusses research appearing in motor control, sports sciences and occupational biomechanics literature to answer whether motor variability is important to consider in an occupational context, and if yes, whether it can be manipulated by training the worker or changing the working conditions so as to increase biomechanical variation without jeopardizing production. The review concludes that motor variability is, indeed, a relevant issue in occupational health and performance and suggests a number of key issues for further research.
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Affiliation(s)
- Divya Srinivasan
- Centre for Musculoskeletal Research, Department of Occupational and Public Health Sciences, University of Gavle, 801 76 Gavle, Sweden.
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Kim JH, Johnson PW. Viability of using digital signals from the keyboard to capture typing force exposures. ERGONOMICS 2012; 55:1395-1403. [PMID: 22897644 DOI: 10.1080/00140139.2012.709542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Although previous studies have shown that systematic temporal changes in keystroke durations may be used as surrogate measures of muscle fatigue, software-based keystroke duration may be adversely affected by different keyswitch force-displacement characteristics. Therefore, this study used a force platform to measure the keystroke durations and compared them to software-based measures in order to determine whether the software-based keystroke duration is a robust surrogate measure for the force-derived durations (independent of keyswitch designs). A total of 13 subjects typed for 15 minutes each on three keyboards with different force-displacement characteristics. The results showed that the software-based keystroke durations closely mirrored and approximated the true force-derived keystroke durations, regardless of the force-displacement characteristics. Furthermore, the subject-dependent correlations indicated that the software-based keystroke durations approximated the true force-derived keystroke durations. Therefore, the software-based keystroke durations could be used as a surrogate non-invasive, cost-effective measure to identify muscle fatigue during computer use for large-scale epidemiological studies. Practitioner Summary: Developing non-invasive, cost-effective computer exposure assessment tools can help researchers develop a better understanding on the underlying mechanisms of computer-related musculoskeletal disorders. This study demonstrates how software measured keystroke duration can be used as a non-invasive, cost-effective exposure assessment measure during computer use.
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Affiliation(s)
- Jeong Ho Kim
- Department of Industrial and Systems Engineering, University of Washington, Seattle, USA
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23
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Rathleff M, Samani A, Olesen C, Kersting U, Madeleine P. Inverse relationship between the complexity of midfoot kinematics and muscle activation in patients with medial tibial stress syndrome. J Electromyogr Kinesiol 2011; 21:638-44. [DOI: 10.1016/j.jelekin.2011.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 03/04/2011] [Accepted: 03/04/2011] [Indexed: 10/18/2022] Open
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Hodges PW. Pain and motor control: From the laboratory to rehabilitation. J Electromyogr Kinesiol 2011; 21:220-8. [PMID: 21306915 DOI: 10.1016/j.jelekin.2011.01.002] [Citation(s) in RCA: 192] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 12/24/2010] [Accepted: 01/06/2011] [Indexed: 01/13/2023] Open
Abstract
Movement is changed in pain and is the target of clinical interventions. Yet the understanding of the physiological basis for movement adaptation in pain remains limited. Contemporary theories are relatively simplistic and fall short of providing an explanation for the variety of permutations of changes in movement control identified in clinical and experimental contexts. The link between current theories and rehabilitation is weak at best. New theories are required that both account for the breadth of changes in motor control in pain and provide direction for development and refinement of clinical interventions. This paper describes an expanded theory of the motor adaptation to pain to address these two issues. The new theory, based on clinical and experimental data argues that: activity is redistributed within and between muscles rather than stereotypical inhibition or excitation of muscles; modifies the mechanical behaviour in a variable manner with the objective to "protect" the tissues from further pain or injury, or threatened pain or injury; involves changes at multiple levels of the motor system that may be complementary, additive or competitive; and has short-term benefit, but with potential long-term consequences due to factors such as increased load, decreased movement, and decreased variability. This expanded theory provides guidance for rehabilitation directed at alleviating a mechanical contribution to the recurrence and persistence of pain that must be balanced with other aspects of a multifaceted intervention that includes management of psychosocial aspects of the pain experience.
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Affiliation(s)
- Paul W Hodges
- The University of Queensland, Centre for Clinical Research Excellence in Spinal Pain, Injury and Health, School of Health and Rehabilitation Sciences, Brisbane, Qld 4072, Australia.
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Godil SS, Shamim MS, Enam SA, Qidwai U. Fuzzy logic: A "simple" solution for complexities in neurosciences? Surg Neurol Int 2011; 2:24. [PMID: 21541006 PMCID: PMC3050069 DOI: 10.4103/2152-7806.77177] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 01/03/2011] [Indexed: 11/24/2022] Open
Abstract
Background: Fuzzy logic is a multi-valued logic which is similar to human thinking and interpretation. It has the potential of combining human heuristics into computer-assisted decision making, which is applicable to individual patients as it takes into account all the factors and complexities of individuals. Fuzzy logic has been applied in all disciplines of medicine in some form and recently its applicability in neurosciences has also gained momentum. Methods: This review focuses on the use of this concept in various branches of neurosciences including basic neuroscience, neurology, neurosurgery, psychiatry and psychology. Results: The applicability of fuzzy logic is not limited to research related to neuroanatomy, imaging nerve fibers and understanding neurophysiology, but it is also a sensitive and specific tool for interpretation of EEGs, EMGs and MRIs and an effective controller device in intensive care units. It has been used for risk stratification of stroke, diagnosis of different psychiatric illnesses and even planning neurosurgical procedures. Conclusions: In the future, fuzzy logic has the potential of becoming the basis of all clinical decision making and our understanding of neurosciences.
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Affiliation(s)
- Saniya Siraj Godil
- Faculty of Health Sciences, Medical College, Aga Khan University, Karachi, Pakistan
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Yang DD, Hou WS, Wu XY, Zheng XL, Zheng J, Jiang YT. Changes in spatial distribution of flexor digitorum superficialis muscle activity is correlated to finger's action. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2011:4108-4111. [PMID: 22255243 DOI: 10.1109/iembs.2011.6091020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Multitendoned extrinsic muscles of the human hand can be divided into several neuromuscular compartments (NMCs), each of which contributes to the ability of human finger to produce independent finger movements or force. The aim of this study was to investigate the changes in the spatial activation of flexor digitorum superficialis (FDS) during the fingertip force production with non-invasive multichannel surface electromyography (sEMG) technique. 7 healthy Subjects were instructed to match the target force level for 5s using individual index finger (I), individual middle finger (M) and the combination of the index and middle finger (IM) respectively. Simultaneously, a 2 × 6 electrode array was employed to record multichannel sEMG from FDS as finger force was produced. The entropy and center of gravity of the sEMG root mean square (RMS) map were computed to assess the spatial inhomogeneity in muscle activation and the change in spatial distribution of EMG amplitude related to the force generation of specific task finger. The results showed that the area and intensity of high amplitude region increased with force production, and the entropy increased with force level under the same task finger. The findings indicate that the change of spatial distribution of multitendoned extrinsic hand muscle activation is correlated to specific biomechanical functions.
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Affiliation(s)
- D D Yang
- Bioengineering Department, University of Chongqing, Chongqing, Chongqing 400030, China.
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